RFC LookUp of Multiple fields

Hii

I'm the mapping I need to look up several fields on the SAP system to complete each message

Rather than writing an RFC to lookup each field, could I have a RFC which will be called once and return all the fields?

How would I then access the return from the RFC to populate the target fields

are there any blogs/wiki's which explain how this is done

I'm using PI 7.0

thanks